Improvement in horseshoes



HARRISON SMITH, OrV sANDYVILLn-AND JOHN H. n

VAR, OHIO.

Leafs Pam No. 91,571, .zaad .ame 22,1869.

IMPROVEMENT IN HoRsEsHons.

The Schedule referred to these Letters Patent and making part ofthe same.

To all whom it ma/y concern Be it known that we, HARRISON SMITH, of-Sandyville, and JOHN H. EVANS, of Bolivar, both in the eountypof-Tuscarawas,and State cfflhio, have invented new and useful Improvements in Horseshoes and we do her'eby declare that the following is a full, clear, and exact description of our-invention,.reference being had to the accompanying drawings, forming a part of this specification, and the letters of reference marked thereon, of which drawings- Figure l is a plan of l our improved horseshoe, with calks turned upward.

Figure 2 is au elevation ofthe same. Figure 3 is'an elevation, showing the principles of construction used in making our improved horseshoe.

igures 4, 5', 6, 7 are elevations of the toe and heelcal s.

The nature of our invention consists in the construe ytion of a horseshoe with two movable toe-calks and movable heel-calks; said calks having a stem with a To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and operation.

'The shoe A is of the, ordinary form, with holes a a, through which pass the nails by which it is secured to the horses foot, and grooves ff, for the heads of said nails.

The toe-calks, B and C, are two in number, and are secured to the shoe A by means of the stems b and c, Vwhich screw into holes in theshoe A. l

The heel-calks D and E ire secured to the shoe A by the stems cl and e in a similar manner.

The screw-thread ou the stem b of the toe-calli B is a right-handed thread, while that on the stem c ofthe o `her toe-calk C, is a lefthanded thread.

The threadonthe stem d of the heelcalk'D, which is behind the toe-calli B, is a left-handed thread, while that on the stem e of the other heel-calli E is a righthanded thread.

It is readilyseen that all the calks in the shoe are screwed into place, and tightened by turning the calks towards the centre of the shoe, as indicated 'by arrows in fi 1.

Wghen a horse has to draw a load, he will either, draw on the 'two toe-calks or on the four calks together, the first case being where the heel-calks have no bearing, and the second case being where a rm bearing ishad by the whole shoe.

. In theirst case the toe-calks, if they move at all, will tend to tighten themselves 'in theshoe A, and in the second case, as the whole shoe has a square bearing, there is nodanger of any of the calks moving-in the shoe.

I The same tightening of the toe-calks must ensue from a drawing of the horse on one toe-calk, as in this case the outer edge ofthe calk is the one acted on, as seen in fig. 3, where the'shoe is inclined, the arrowH representing the direction `ot` the force applied to the shoe by the drawing of the horse, and the arrow h, the direction of' the force applied to the toe-calli B.

In case the horse has to hold backa load, asin goingl down-hill, hewill either hold on the Vwhole shoe or on the heel-calks only.

In the first case there will be no danger of the calks working loose, and in the second case, as the outer edge of heel-calli is the edge to take the bearing, the tendency is to tighten the calk, as seen in g. 3, where the arrowsK represent the direction of the force applied to the shoe by the holding back of the horse, and the-arrows Ic, the direction of the force-applied to the calk D.

The same explanation will apply to the slipping of the horse on the side ot' the fo'ot, from which it is readily seen that no extra device is required to insure the calks from working loose.

Having thus fully described our invention,

What we claim as our invention, and desire to se-l'v cure by Letters Patent, iis- A horseshoe, compose'd'of the shoe A, toe-calks I?.v and C, and heel-calks D E, with stems b c and d e,

having-right or left-handed threads cut on each, re-

spectively, as herein shown, the several parts being,` arranged and combined substantially in the manner and for the purpose herein specified.

As evidence that `we claim theforegoing, we have hereunto s'et our hands, in the presence of two witnesses,

this day of A. D. 1868.

`HARRISON SMITH.

JOHN H. EVANS. Witnesses :v 1

J. F. EVANS, N. BAKER.

VANS, OF BOLI# 

